Hydraulic Jump

Hydraulic Jumps Explained

Fig. 1: A Standing Wave (aka Stationary hydraulic jump) occurs when a flow of liquid at high velocity discharges into a zone of the river or engineered structure which can only sustain a lower velocity

A hydraulic jump is a phenomenon common in open channel flow. If flow before the jump is supercritical, a jump will occur and flow after the jump will be subcritical. The jump destroys excess energy (velocity).